I bought a Harmon/Kardon drive+play 1, and the wired FM modulator.
I had it installed by a pal who has previously been quite skilled and reliable. BIG mistake.
The Harmon/Kardon display is pretty okay. The device has about the best iPod integration that one can get. However, the choices for getting the signal to my HU include the cassette adapter (best sound quality, ugliest appearance,) the wireless FM adapter (not helpful,) the wired FM adapter, which my pal decided needed to be broken into its component pieces and then re-soldered in two halves, and doesn't work worth a flip, because in a metropolitan area, nearly EVERY frequency has distortion or signal on it.
So, the wired FM modulator is unusable. And, my friend'* installation shorted out the other day, and now it'* just a big bunch of beautifully made junk.
There is this new line of head units - here'* an example - Factory Look-A-Like DVD Receivers To Fit Chrysler,Dodge and Jeep Vehicles
Perfect chassis fit. Bluetooth phone integration, iPod integration, etc. Says that they can work with steering wheel controls with an adapter. They don't seem to be able to answer questions about the chimes, OnStar and so on.